arch/mips/cobalt/setup.c

   1 /*
   2  * Setup pointers to hardware dependent routines.
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 1996, 1997, 2004, 05 by Ralf Baechle (ralf@linux-mips.org)
   9  * Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
  10  *
  11  */
  12 #include <linux/interrupt.h>
  13 #include <linux/pci.h>
  14 #include <linux/init.h>
  15 #include <linux/pm.h>
  16 #include <linux/serial.h>
  17 #include <linux/serial_core.h>
  18
  19 #include <asm/bootinfo.h>
  20 #include <asm/time.h>
  21 #include <asm/io.h>
  22 #include <asm/irq.h>
  23 #include <asm/processor.h>
  24 #include <asm/reboot.h>
  25 #include <asm/gt64120.h>
  26
  27 #include <asm/mach-cobalt/cobalt.h>
  28
  29 extern void cobalt_machine_restart(char *command);
  30 extern void cobalt_machine_halt(void);
  31 extern void cobalt_machine_power_off(void);
  32 extern void cobalt_early_console(void);
  33
  34 int cobalt_board_id;
  35
  36 const char *get_system_type(void)
  37 {
  38         switch (cobalt_board_id) {
  39                 case COBALT_BRD_ID_QUBE1:
  40                         return "Cobalt Qube";
  41                 case COBALT_BRD_ID_RAQ1:
  42                         return "Cobalt RaQ";
  43                 case COBALT_BRD_ID_QUBE2:
  44                         return "Cobalt Qube2";
  45                 case COBALT_BRD_ID_RAQ2:
  46                         return "Cobalt RaQ2";
  47         }
  48         return "MIPS Cobalt";
  49 }
  50
  51 void __init plat_timer_setup(struct irqaction *irq)
  52 {
  53         /* Load timer value for HZ (TCLK is 50MHz) */
  54         GT_WRITE(GT_TC0_OFS, 50*1000*1000 / HZ);
  55
  56         /* Enable timer */
  57         GT_WRITE(GT_TC_CONTROL_OFS, GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK);
  58
  59         /* Register interrupt */
  60         setup_irq(COBALT_GALILEO_IRQ, irq);
  61
  62         /* Enable interrupt */
  63         GT_WRITE(GT_INTRMASK_OFS, GT_INTR_T0EXP_MSK | GT_READ(GT_INTRMASK_OFS));
  64 }
  65
  66 extern struct pci_ops gt64111_pci_ops;
  67
  68 static struct resource cobalt_mem_resource = {
  69         .start  = GT_DEF_PCI0_MEM0_BASE,
  70         .end    = GT_DEF_PCI0_MEM0_BASE + GT_DEF_PCI0_MEM0_SIZE - 1,
  71         .name   = "PCI memory",
  72         .flags  = IORESOURCE_MEM
  73 };
  74
  75 static struct resource cobalt_io_resource = {
  76         .start  = 0x1000,
  77         .end    = 0xffff,
  78         .name   = "PCI I/O",
  79         .flags  = IORESOURCE_IO
  80 };
  81
  82 /*
  83  * Cobalt doesn't have PS/2 keyboard/mouse interfaces,
  84  * keyboard conntroller is never used.
  85  * Also PCI-ISA bridge DMA contoroller is never used.
  86  */
  87 static struct resource cobalt_reserved_resources[] = {
  88         {       /* dma1 */
  89                 .start  = 0x00,
  90                 .end    = 0x1f,
  91                 .name   = "reserved",
  92                 .flags  = IORESOURCE_BUSY | IORESOURCE_IO,
  93         },
  94         {       /* keyboard */
  95                 .start  = 0x60,
  96                 .end    = 0x6f,
  97                 .name   = "reserved",
  98                 .flags  = IORESOURCE_BUSY | IORESOURCE_IO,
  99         },
 100         {       /* dma page reg */
 101                 .start  = 0x80,
 102                 .end    = 0x8f,
 103                 .name   = "reserved",
 104                 .flags  = IORESOURCE_BUSY | IORESOURCE_IO,
 105         },
 106         {       /* dma2 */
 107                 .start  = 0xc0,
 108                 .end    = 0xdf,
 109                 .name   = "reserved",
 110                 .flags  = IORESOURCE_BUSY | IORESOURCE_IO,
 111         },
 112 };
 113
 114 static struct pci_controller cobalt_pci_controller = {
 115         .pci_ops        = &gt64111_pci_ops,
 116         .mem_resource   = &cobalt_mem_resource,
 117         .mem_offset     = 0,
 118         .io_resource    = &cobalt_io_resource,
 119         .io_offset      = 0 - GT_DEF_PCI0_IO_BASE,
 120 };
 121
 122 void __init plat_mem_setup(void)
 123 {
 124         static struct uart_port uart;
 125         unsigned int devfn = PCI_DEVFN(COBALT_PCICONF_VIA, 0);
 126         int i;
 127
 128         _machine_restart = cobalt_machine_restart;
 129         _machine_halt = cobalt_machine_halt;
 130         pm_power_off = cobalt_machine_power_off;
 131
 132         set_io_port_base(CKSEG1ADDR(GT_DEF_PCI0_IO_BASE));
 133
 134         /* I/O port resource must include LCD/buttons */
 135         ioport_resource.end = 0x0fffffff;
 136
 137         /* These resources have been reserved by VIA SuperI/O chip. */
 138         for (i = 0; i < ARRAY_SIZE(cobalt_reserved_resources); i++)
 139                 request_resource(&ioport_resource, cobalt_reserved_resources + i);
 140
 141         /* Read the cobalt id register out of the PCI config space */
 142         PCI_CFG_SET(devfn, (VIA_COBALT_BRD_ID_REG & ~0x3));
 143         cobalt_board_id = GT_READ(GT_PCI0_CFGDATA_OFS);
 144         cobalt_board_id >>= ((VIA_COBALT_BRD_ID_REG & 3) * 8);
 145         cobalt_board_id = VIA_COBALT_BRD_REG_to_ID(cobalt_board_id);
 146
 147         printk("Cobalt board ID: %d\n", cobalt_board_id);
 148
 149 #ifdef CONFIG_PCI
 150         register_pci_controller(&cobalt_pci_controller);
 151 #endif
 152
 153         if (cobalt_board_id > COBALT_BRD_ID_RAQ1) {
 154 #ifdef CONFIG_SERIAL_8250
 155                 uart.line       = 0;
 156                 uart.type       = PORT_UNKNOWN;
 157                 uart.uartclk    = 18432000;
 158                 uart.irq        = COBALT_SERIAL_IRQ;
 159                 uart.flags      = UPF_IOREMAP | UPF_BOOT_AUTOCONF |
 160                                   UPF_SKIP_TEST;
 161                 uart.iotype     = UPIO_MEM;
 162                 uart.mapbase    = 0x1c800000;
 163
 164                 early_serial_setup(&uart);
 165 #endif
 166         }
 167 }
 168
 169 /*
 170  * Prom init. We read our one and only communication with the firmware.
 171  * Grab the amount of installed memory.
 172  * Better boot loaders (CoLo) pass a command line too :-)
 173  */
 174
 175 void __init prom_init(void)
 176 {
 177         int narg, indx, posn, nchr;
 178         unsigned long memsz;
 179         char **argv;
 180
 181         mips_machgroup = MACH_GROUP_COBALT;
 182
 183         memsz = fw_arg0 & 0x7fff0000;
 184         narg = fw_arg0 & 0x0000ffff;
 185
 186         if (narg) {
 187                 arcs_cmdline[0] = '\0';
 188                 argv = (char **) fw_arg1;
 189                 posn = 0;
 190                 for (indx = 1; indx < narg; ++indx) {
 191                         nchr = strlen(argv[indx]);
 192                         if (posn + 1 + nchr + 1 > sizeof(arcs_cmdline))
 193                                 break;
 194                         if (posn)
 195                                 arcs_cmdline[posn++] = ' ';
 196                         strcpy(arcs_cmdline + posn, argv[indx]);
 197                         posn += nchr;
 198                 }
 199         }
 200
 201         add_memory_region(0x0, memsz, BOOT_MEM_RAM);
 202 }
 203
 204 void __init prom_free_prom_memory(void)
 205 {
 206         /* Nothing to do! */
 207 }